- - %%b: full backtrace (Called %%throwable in LOG4J).
- Defined only under windows or when using the GNU libc because backtrace() is not defined
- elsewhere, and we only have a fallback for windows boxes, not mac ones for example.
- - %%B: short backtrace (only the first line of the %%b).
- Called %%throwable{short} in LOG4J; defined where %%b is.
-